Chronological Age Estimation of Male Occipital Bone Based on FTIR and Raman Microspectroscopy

Table 1

Primary band assignments in the FTIR and Raman spectrum of bone and the four widely used outcomes.

Parameter	FTIR (cm^−1)	Raman (cm^−1)
PO4^3−ν2	—	410–460
PO4^3−ν4	—	587
ν(C–C) hydroxyproline	—	874
ν(C–C) proline	—	920
CO3^2−ν2	850–890	—
PO4^3−ν1	—	930–980
PO4^3−ν1ν3	900–1200	—
ν(C–C) phenylalanine	—	1003
CO3^2−ν1–PO4^3−ν3	—	1050–1100
Amide III	1210–1320	1215–1300
CH2	1410, 1445	1446
Amide II and CO3^2−ν3	1510–1590	—
Amide I	1592–1712	1620–1700
Lipid esters	1745	—
Mineral/matrix	(900–1200) : (1592–1712)	(410–460) : (1215–1300)
Carbonate/phosphate	(850–890) : (900–1200)	(1050–1100) : (930–980)
Crystallinity	1030 : 1020	1 : FWHM PO4^3−ν1
Collagen maturity	1660 : 1690	1660 : 1690